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Windows XP Service Pack 2 is cumulative, meaning it includes Service Pack 1
and all updates predating SP2's release. Although Service Pack 2, was
released over a year ago, some of you may not have updated to it yet.

Installing Service Pack 2 should NOT be performed until you have ensured
your system is fully cleaned of all viruses and malware. This is the
recommended procedure by Microsoft before installing SP2. Some computers lock
up when SP2 is installed with certain spyware in residence, and spyware
programs can interfere with the new security features that SP2 installs by
default. For a complete discussion on all necessary precautions see: What to
Know Before You Download and Install Windows XP Service Pack 2http://www.microsoft.com/windowsxp/...oknow.mspxhttp://wiki.castlecops.com/Malware_Prevention:_Prevent_Re-infection